The NIBCO PCR-34M is a professional 3/4″ OD mini pressing jaw built for the NIBCO PressACR® copper press system. It is intended for use with the NIBCO PCR-20M mini press tool, making it the correct jaw when you need to press 3/4″ OD ACR copper connections in HVAC/R applications.
During operation, the jaw installs into the press tool and must close completely to help ensure a leak-free press connection. This jaw is part of the PressACR system approach for consistent press results, and it’s designed specifically to work with NIBCO PressACR fittings and tooling.
For compliance and reliability, NIBCO documentation for PressACR tooling emphasizes that only NIBCO jaws should be used to press NIBCO PressACR fittings; using other jaws can void warranty and compromise results.
Because it’s the mini jaw format (PCR-M), it’s a strong fit for jobs where space is tight and you want compact handling while still pressing a larger line size like 3/4″ OD.

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